The Avada Kedavra( Killing Curse) one of the three Unforgivable curse and a tool of the Dark Arts. It is  one of the most powerful , considered to be the Darkest  and terrible curses created.
 
When successfully cast on a living person or creature, this curse resulted in immediate and painless death, with no bodily injuries and no evidence of violence. These Killing Curse invented during the early Middle Ages by Dark witches or wizards in harry potter time. This curse killed enough people to create an army of Inferi of witches.
 
There is no counter spell for it other than sacrificial protection, and only one person, Harry Potter, has ever survived it from this curse.this curse use flash of green light and the rushing noise emitted from the caster's wand.
 
Its firstly Used it on Gellert Grindelwald's orders to take over a house for a family of Muggles and use it as a temporary headquarters.
 
If there is someone in your life who is creating problems for you , then this curse can help you with that. This is a powerful and irreversible spell.
The results of this ritual very instant. You can use this spell to get revenge in form of death . This spell and ritual are to truly destroy someone, internally and externally. I gurrantee you there is no bad karma .
I advise that you get a free consultation before purchasing this curse  to make sure it’s the right for you and for your situation.
 
Information needed for casting Avada Kedavra( Killing Curse)
Name and one photo of target